Optical transceiver for 100 gigabit/second transmission

Abstract

An optical transmitter for converting and coupling an information-containing electrical signal with an optical fiber having an electrical input for coupling with an external electrical cable or information system device having a plurality of parallel data lines, a modulator for converting between an information-containing electrical signal on each data line and a multi-level digital pulse amplitude modulated signal corresponding to the binary electrical signal; and a signal timing circuit coupled to said modulator for aligning the data signal to a predetermined clock signal. The transmitter is preferably wavelength division multiplexed, using an electro-optical subassembly coupled to each respective timer circuit for converting between the information-containing electrical signal and a modulated optical signal corresponding to the electrical signal at a predetermined wavelength. The transceiver is preferably implemented in a pluggable standardized form factor.

1. An optical transmitter for converting and coupling an information-containing electrical signal with an optical fiber comprising:
 an electrical input for coupling with an external electrical cable or information system device having a plurality of parallel data lines and for transmitting information-containing electrical communications signals over said data lines, and a fiber optic connector adapted for coupling with an external optical fiber for transmitting an optical communications signal; 
 a modulator for converting between an information-containing electrical signal on each data line and a pulse amplitude modulated signal corresponding to the binary electrical signal; 
 a signal timing circuit coupled to said modulator for aligning the data signal to a predetermined clock signal; 
 an electro-optical subassembly coupled to each respective timer circuit for converting between the information-containing electrical signal and a modulated optical signal corresponding to the electrical signal at a predetermined wavelength; and 
 a multiplexer for multiplexing the respective optical beams into a single optical beam for transmission over the optical fiber, wherein said pulse amplitude modulated signal is a multilevel digital signal. 
 
     
     
       2. An optical transmitter for converting and coupling an information-containing electrical signal with an optical fiber comprising:
 an electrical input for coupling with an external electrical cable or information system device having a plurality of parallel data lines and for transmitting information-containing electrical communications signals over said data lines, and a fiber optic connector adapted for coupling with an external optical fiber for transmitting an optical communications signal; 
 a modulator for converting between an information-containing electrical signal on each data line and a pulse amplitude modulated signal corresponding to the binary electrical signal; 
 a signal timing circuit coupled to said modulator for aligning the data signal to a predetermined clock signal; 
 an electro-optical subassembly coupled to each respective timer circuit for converting between the information-containing electrical signal and a modulated optical signal corresponding to the electrical signal at a predetermined wavelength; and 
 a multiplexer for multiplexing the respective optical beams into a single optical beam for transmission over the optical fiber, wherein said single multifrequency optical beam transmits data at 100 Gbps. 
 
     
     
       3. An optical transceiver for converting and coupling an information-containing electrical signal with an optical fiber comprising:
 a housing including an electrical connector for coupling with an external electrical cable or information system device and for transmitting and/or receiving an information-containing electrical communications signal, and a fiber optic connector adapted for coupling with an external optical fiber for transmitting and/or receiving an optical communications signal; 
 at least one electro-optical subassembly in the housing for converting between an information-containing electrical signal and a modulated optical signal corresponding to the electrical signal; and 
 a multi-level digital pulse amplitude modulation processing subassembly in the housing for processing the communications signal into a predetermined electrical or optical communications protocol, wherein said multi-level digital pulse amplitude modulation processing subassembly encodes a two bit data signal into one of four optical amplitude levels.